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Francium! The Most Insane Element?
Meet francium in seconds — the rare, explosive-sounding alkali metal you’ve never met! Countdown Curiosity: 5 rapid facts about francium (atomic number 87) — discovery, extreme radioactivity, rarity in nature, why you’ll never hold it, and wild decay facts. Learn why francium is called the most insane element and how it sits on the ...
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